108993647 has 16 divisors (see below), whose sum is σ = 132213312. Its totient is φ = 87713280.

The previous prime is 108993631. The next prime is 108993659. The reversal of 108993647 is 746399801.

It is a cyclic number.

It is not a de Polignac number, because 108993647 - 2⁴ = 108993631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108998647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63533 + ... + 65225.

It is an arithmetic number, because the mean of its divisors is an integer number (8263332).

Almost surely, 2^108993647 is an apocalyptic number.

108993647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

108993647 is a deficient number, since it is larger than the sum of its proper divisors (23219665).

108993647 is a wasteful number, since it uses less digits than its factorization.

108993647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 108993647 is about 10440.0022509576. The cubic root of 108993647 is about 477.6763373827.

Subtracting from 108993647 its sum of digits (47), we obtain a square (108993600 = 10440²).

The spelling of 108993647 in words is "one hundred eight million, nine hundred ninety-three thousand, six hundred forty-seven".